GDI+: GdipAddPathBeziers

[José Roca]

The following example creates a GraphicsPath object path, adds a sequence of two connected Bézier splines to path, closes the current figure (the only figure in this case), and then draws path.

C++

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VOID Example_AddBeziers(HDC hdc)
{
   Graphics graphics(hdc);
   GraphicsPath  path;

   PointF pts[] = {PointF(50.0f,50.0f),
                   PointF(60.0f,20.0f),
                   PointF(70.0f,100.0f),
                   PointF(80.0f,50.0f),
                   PointF(120.0f,40.0f),
                   PointF(150.0f,80.0f),
                   PointF(170.0f,30.0f)};

   path.AddBeziers(pts, 7);
   path.CloseFigure();
   
   // Draw the path.
   Pen pen(Color(255, 255, 0, 0));
   graphics.DrawPath(&pen, &path);
}


PowerBASIC

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SUB GDIP_AddPathBeziers (BYVAL hdc AS DWORD)

   LOCAL hStatus AS LONG
   LOCAL pGraphics AS DWORD
   LOCAL pPath AS DWORD
   LOCAL pPen AS DWORD
   DIM   pts(6) AS POINTF

   hStatus = GdipCreateFromHDC(hdc, pGraphics)

   hStatus = GdipCreatePath(%FillModeAlternate, pPath)
   pts(0).x = 50  : pts(0).y = 50
   pts(1).x = 60  : pts(1).y = 20
   pts(2).x = 70  : pts(2).y = 100
   pts(3).x = 80  : pts(3).y = 50
   pts(4).x = 120 : pts(4).y = 40
   pts(5).x = 150 : pts(5).y = 80
   pts(6).x = 170 : pts(6).y = 30
   hStatus = GdipAddPathBeziers(pPath, pts(0), 7)
   hStatus = GdipClosePathFigure(pPath)

   ' // Draw the path.
   hStatus = GdipCreatePen1(GDIP_ARGB(255, 255, 0, 0), 1, %UnitWorld, pPen)
   hStatus = GdipDrawPath(pGraphics, pPen, pPath)

   ' // Cleanup
   IF pPen THEN GdipDeletePen(pPen)
   IF pPath THEN GdipDeletePath(pPath)
   IF pGraphics THEN GdipDeleteGraphics(pGraphics)

END SUB